À About this product 1. This keypad has password is suitable for folding doors, that is, the revolving door operator can be equipped with it as access control, because its keys have left and right arrow directions and are suitable for operating both left and right doors. 2. It looks waterproof and comes in two colors. Overall, it is compact and practical. 3. Don't worry if you can't see at night, LED lights illuminate it, allowing you to quickly open the door when you come home at night. 4. It is very convenient to enter the password if you forget to take the remote control with you. Specification 1. Power supply: CR2032 lithium battery (230 mAh) 2. 1 year based on 10 uses per day 3. Operating frequency: 433.92 MHz +/-75 KH 4. Transmitting power: approx. 1 mW 5. Coding format: standard rolling code format 6. Operating temperature: -20 °C to +55 °C7. Number of password digits: 0 to 8 digits 8. Starting distance: open distance 50 meters; indoor distance 35 meters 9. Protection degree: